Results 11 to 20 of about 3,641,286 (288)

Numerical simulation of air layer morphology on flat bottom plate with air cavity and evaluation of the drag reduction effect

open access: yesInternational Journal of Naval Architecture and Ocean Engineering, 2019
To investigate the morphology characteristics of air layer in the air cavity, a numerical method with the combination of RANS equations and VOF two-phase-flow model is proposed for a plate with air cavity.
W.U. Hao, O.U. Yongpeng
doaj   +2 more sources

Air flow in a collapsing cavity [PDF]

open access: yesPhysics of Fluids, 2013
We experimentally study the airflow in a collapsing cavity created by the impact of a circular disc on a water surface. We measure the air velocity in the collapsing neck in two ways: Directly, by means of employing particle image velocimetry of smoke injected into the cavity and indirectly, by determining the time rate of change of the volume of the ...
Peters, Ivo R.   +3 more
openaire   +5 more sources

Numerical simulation of air cavity under a simplified model-scale hull form

open access: yesJournal of Ocean Engineering and Science, 2020
Injecting air under hulls of marine vessels can lead to reduction of their hydrodynamic resistance. Since experimental development of air-assisted hulls usually requires a large number of tests, numerical simulations of air-ventilated water flows can ...
Konstantin I. Matveev
doaj   +2 more sources

Analysis and control of resonant cavity flows [PDF]

open access: yes, 2013
Recently, the trend for the internalisation of stores within an aircraft fuselage has led to a renewed interest in the field of cavity aero-acoustics.
Roberts, David
core   +7 more sources

Interaction effects between surface radiation and double-diffusive turbulent natural convection in an enclosed cavity filled with solid obstacles [PDF]

open access: yes, 2012
The work reported here is a 2D numerical study on the buoyancy-driven low speed flow of humid air inside a rectangular cavity partially filled with solid cylindrical objects and whose vertical walls are maintained at 1.2 and 21 oC.
Roger Penlington   +5 more
core   +1 more source

Functional aerodynamics and its influence on the energy and thermal mode of a naturally ventilated double-skin transparent façade

open access: yesActa Polytechnica, 2022
This article deals with the dynamics of airflow through a cavity. In windless conditions, where a natural flow causes the flow of air in the cavity, the overall aerodynamic resistance of the cavity is the important aerodynamic parameter, which is the sum
Michal Franek   +3 more
doaj   +1 more source

Acoustic Scattering Characteristics of Underwater Eight-grid Air-filled Cavity Corner Reflector

open access: yes水下无人系统学报, 2022
Underwater corner reflectors have a strong acoustic scattering ability and can be used to mark underwater structures and simulate underwater false targets. In accordance with the limitation of the reflection range of a single-grid corner reflector, a new
Zi-chao CHU, Yi LUO, Wu-di WEN
doaj   +1 more source

Simultaneous Measurement of Air Pressure and Temperature Using Fiber-Optic Cascaded Fabry–Perot Interferometer

open access: yesIEEE Photonics Journal, 2019
We propose and demonstrate a fiber-optic cascaded-cavity Fabry–Perot interferometer (FPI) for simultaneous measurement of air pressure and temperature. The open-cavity hybrid FPI consists of an air-cavity and a silica-cavity formed by a section of
Zhigang Li   +4 more
doaj   +1 more source

The Effect of Air leakage through the Air Cavities of Building Walls on Mold Growth Risks

open access: yesEnergies, 2020
Mold growth poses a high risk to a large number of existing buildings and their users. Air leakage through the air cavities of the building walls, herein gaps between walls and air conditioner pipes penetrating the walls, may increase the risks of ...
Yonghui Li   +5 more
doaj   +1 more source

Natural ventilation and cooling by evaporation in hot-arid climates [PDF]

open access: yes, 1990
In hot climates, outside air is too hot during the day. In hot arid climates, low humidity increases discomfort. For comfort, hot air should be cooled before flowing into dwellings and moisture in the moving air increased.
Aboul Naga, Mohsen M
core   +5 more sources

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